JavaScript Exercises: Remove a specific element from a stack

JavaScript Stack: Exercise-14 with Solution

Remove Specific Element from Stack

Write a JavaScript program to remove a specific element from a stack.

Sample Solution:

JavaScript Code:

class Stack {
  constructor() {
    this.items = [];
  }
  push(element) {
    this.items.push(element);
  }
  pop() {
    if (this.isEmpty()) {
      return "Underflow";
    }
    return this.items.pop();
  }
  peek() {
    return this.items[this.items.length - 1];
  }
  isEmpty() {
    return this.items.length === 0;
  }
  size() {
    return this.items.length;
  }
remove(ele) {
    let index = this.items.indexOf(ele);
    if (index == -1) {
      return "Element not found in the stack";
    }
    this.items.splice(index, 1);
    return;
  }  
displayStack(stack) {
  console.log("Stack elements are:");
  let str = "";
  for (let i = 0; i < stack.items.length; i++)
    str += stack.items[i] + " ";
  return str.trim();
 }      
}
let stack = new Stack();
stack.push(1);
stack.push(2);
stack.push(3);
stack.push(4);
stack.push(5);
stack.push(6);
stack.push(7);
console.log(stack.displayStack(stack));
n = 1;
console.log("Remove "+n+" from the said stack:");
stack.remove(n); 
console.log(stack.displayStack(stack));
n = 7;
console.log("Remove "+n+" from the said stack:");
stack.remove(n); 
console.log(stack.displayStack(stack));
n = 4;
console.log("Remove "+n+" from the said stack:");
stack.remove(n); 
console.log(stack.displayStack(stack));

Sample Output:

Stack elements are:
1 2 3 4 5 6 7
Remove 1 from the said stack:
Stack elements are:
2 3 4 5 6 7
Remove 7 from the said stack:
Stack elements are:
2 3 4 5 6
Remove 4 from the said stack:
Stack elements are:
2 3 5 6

Flowchart:

Live Demo:

See the Pen javascript-stack-exercise-14 by w3resource (@w3resource) on CodePen.

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